Antimicrobial coatings and method using diiodomethyl sulfones

ABSTRACT

Application of a coating composition comprising halomethyl sulfones protects agricultural and industrial substrates against fungicidal and bacterial attack. Use of diiodomethyl sulfones is especially effective to protect latex paint films, textiles, seeds and growing crops.

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[72] Inventors Aldo J. Crow. 2, 424/337 Lake Forest; 3,465,044 9/1959 l-lirano et a1. 424/337 Donald S. Kenney, Northbrook, Village; 3, 71,570 10/1969 Boesch et al.... 260/607 Richard B. l-lasbrouck, Lake Forest, all of 2,127,400 8/1938 Gibbs 260/607 A 111. 2,470,077 5/1949 Fincke.. 260/607 A [21] Appl. No. 805,877 2,628,982 2/1953 James 260/607 A [22] Filed Mar.10,1969 3,051,757 8/1962 Johnston 260/607 A [45] Patented Oct. 26,1971 3,061,645 10/1962 Buchanan etal. 260/607 A [73] Assignee Abbott Laboratories 3,066,166 11/1962 Muth et al. 260/556 A North Chicago, 111. 3,338,779 8/1967 Herschler et al... 260/607 A 3,101,377 8/1963 Bluestone et al.. 260/607 A 3,138,519 5/1964 Ridenetal 106/15 AF 3SEZESD JQEESiliil' WREGNPATENTS 24 ClaimsNo Drawings 728,969 4/1955 GreatBntam 424/337 Primary E.taminer-.1ulius Frome [52] 11.8. C1 106/15,

96/88, 117/1385,260/29.6,260/45.7,260/45.9, j fg iggfg 260/556, 260/607,424/33,424/337 51 lnt.Cl A01n9/12, A01n 2l/00,C07c l47/08,C08f45/64 [50] Field of Search 260/607 A,

' 556 E, 556 607 A; 06/15 15 AF; 424/337 ABSTRACT: Application of a coating composition comprising halomethyl sulfones protects agricultural and industrial [56] References cued substrates against fungicidal and bacterial attack. Use of UNITED STATES PATENTS .diiodomethyl sulionesjs especially effective to protect latex 2,484,489 10/1949 Craig 424/337 paint fiLm s teXIiIeS, seeds and growing crops.

ANTIMICROBIAL COATINGS AND METHOD USING DIIODOMETHYL SULFONES This invention relates to a coating composition to protect potential host materials against attack by fungi and bacteria. It relates particularly to the protection of industrial products such as paint films, textiles and the like and to protection of agricultural products such as seeds and plants.

A large variety of industrial and agricultural goods are subject to deterioration and decay because of attack by bacteria and fungi. Polished surfaces may be injured, paint films are damaged and become unsightly when covered with the parasitic organism and textiles and wood are consumed. The presence of bacteria and fungi in paper mill systems, oil wells and jet fuels clog the filters and otherwise interfere with their circulation.

Agricultural products are susceptible to attack throughout most of their growth cycle, and as a result protective agents are required for seeds, growing stalks and plants. The protection of agricultural products is particularly difficult because of the need to provide an agent toxic to the parasitic plant which will not at the same time injure the host plant; this requires a high degree of selectivity in the protective agent. It is most difficult to predict which agents will attack the parasite without injuring the host and useful agents are most often discovered empirically.

It is an object of this invention, therefore, to provide a coating composition for applying a protective compound to industrial and agricultural substrates to inhibit attack by fungi and bacteria. It is a further object of this invention to provide a method for the use of such a coating composition. It is still a further object of this invention to provide a composition which will protect painted surfaces, textiles and seeds from bacterial and fungal attack.

These and other objects which will become apparent from the following description and examples are attained through the provision of a coating composition comprising a compound of the formula wherein R is alkyl, cycloalkyl, phenyl, loweralkylphenyl, monohalophenyl, anilino, anilamido, loweralkoxyphenyl, naphthyl, nitrophenyl, halonitrophenyl, nitroloweralkylphenyl, haloloweralkylphenyl, polyloweralkylphenyl and polyhalophenyl wherein the halogen is selected from the group consisting of fluorine, bromine and iodine, and n is an integer from to 4, when X, Y and 2 have a total atomic weight greater than l and are selected from the group consisting of hydrogen and halogen. ln addition, R may be polychlorophenyl when X, Y and Z have a total atomic weight greater than 250 and are selected from the group consisting of hydrogen and halogen. The term loweralkyl is intended to include those substituents having from one to seven carbon atoms. By alkyl" is meant those substituents having from one to about carbon atoms and additionally those alkyl groups having more than about 20 carbon atoms which do not substantially alter the essential activity or character of the remainder of the molecule.

The quantity of the compound employed and the concentration at which it is applied to protect the host material varies widely with the application and in some instances may be dictated by economic considerations. A quantity equal to from 0.1 percent to about 2 percent by weight may be employed in latex paint to protect not only the paint in the can prior to its application but also the film formed upon drying of the paint and the substrate upon which the paint has been coated. Application to a textile may be from a solvent which upon evaporation deposits more than about one-tenth of one percent to about 1 percent of a protective compound upon the textile fibers. When applying the compounds of this invention to seeds and growing plants, a coating of as little as l0 parts per million provides excellent protection although larger quantities up to about 6 ounces per bushel may be applied in certain circumstances.

The compositions may be employed in various types of formulations known tothe art including solutions, emulsifiable concentrates, wettable powders, dusts and the like. The compounds likewise may be employed with other biocidal agents which occasionally may be desired to provide an optimum level of protection against the parasites expected to be encountered.

The compounds of the present invention are prepared by halogenating R-sulfonyl acetic acids with a sodium hypohalite in an alkaline aqueous solution followed by decarboxylation. The reaction may be represented as follows:

The following examples will illustrate the preparation of the compounds of this invention but should not be regarded as limiting.

EXAMPLE A p-BROMOPHENYL-DIBROMOMETHYL SULFONE p-Bromophenyl dibromomethyl sulfone was prepared by dissolving l9.5 (0.07 mole) of p-bromophenylsulfonyl acetic acid in 320 ml. of 5 percent aqueous sodium hydroxide solution which was chilled to less than 10 C. as 21.3 g. (0.133 mole) of bromine was slowly added. When addition was complete, the mixture was stirred in the cold another 2 hours and at room temperature overnight. The solid which formed was filtered and air-dried to yield 26.7 g. of p-bromophenyl-dibromomethyl sulfone melting at ll8-12l C. It could be crystallized from dilute ethanol. Calculated for C,H Br;,O S: C=2l.40%; H=1.28%; Br=6l.02% Found: C=2 l 64%, H=l 23%; Br=60.94%

EXAMPLE B p-BROMOPHENYL-TRIBROMOMETHYL SULFONE p Bromophenyl-tribromomethyl sulfone was prepared according to the procedure of Example A, but a proportionately larger quantity of bromine was used. The presence of the dibromomethyl and tribromomethyl moiety of the compound of Examples A and B was confirmed with NMR spectra.

EXAMPLE C p-METHOXYPHENYL DIIODOMETHYL SULFONE p-Methoxyphenyl diiodomethyl sulfone was prepared by dissolving 11.5 g. (0.05 mole) of p-methoxyphenylsulfonyl acetic acid in 40 ml. of 5 percent aqueous sodium hydroxide (0.05 mole). A solution of sodium hypoiodite was prepared by adding iodine monochloride, 19.5 g. (0.12 mole) to 200 ml. 5 percent sodium hydroxide solution. The hypoiodite was added to the stirred sulfonyl acetic acid solution at room temperature and after the addition was completed, this mixture was stirred for 2 hours. It was then acidified with 22 ml. of concentrated HCl solution and stirred another 2 hours at room temperature while carbon dioxide evolved. The mixture was made alkaline with 50 percent sodium hydroxide solution and stirred for 15 minutes. The tan product was filtered off, washed with water, triturated with sodium bisulfite solution to remove color, filtered and washed again. The crude dried pmethoxyphenyl diiodomethyl sulfone weighed 18.5 g. and was crystallized from acetone-water, melting point 132-4. Calculated for C l-1 1 8:C=21.93%;1-1=1.84%;1=57.95% Found: C=21.85%;1-1=2.11%;1=57.97%

Other representative compounds similarly prepared and their respective melting points are:

Compound Melting Point 4-tolyl diiodomethyl sulfone 145-149 phenyl diiodomelhyl sult'one 95-98 4-tolyl dibromomcthyl sulfone 114-116 4-tolyl tribromomethyl sulfonc 147-149 4-(methyl amido)-phenyl-diiodomethyl n-heptyl diiodomethyl sulfonc 63-67 4-uminophenyl diiodomethyl sulfone 180-182 4-chlorophcnyl diiodomethyl sulfone 132-134 4-t-butyl-phenyl diiodoniethyl sulfone 129-130 3-toly1diiodomcthylsulfone 104-105 2-to1yl diiodomethyl sulfone 123-124 es ftwhy 3- 73 alphanuphthyl diiodomethyl sulfonc 138-141 2-methy1-4-bromophcnyl diiodomethyl sull'one 114-115 3-mcthyl-4-bromophenyl diiodomethyl sulfone 136-139 n-butyl diiodomethyl sulfone 3B- 40 bcnzyl diiodomcthyl sull'one 154-156 2.4-dime1hylphenyl diiodomethyl sulfonc 114-117 3.4-dichlorophcnyl diiodomethyl sulfone 144-146 4-chlorophenyl dibromomelhyl sulfonc 112-116 4-methoxyphenyl dibromomethyl sulfonc 80-113 ethyl diiodomelhyl sulfonc 88-89 t-butyl diiodomethyl sulfonc 99-101 4-chlorophcny1tribromomethylsulfonc 160-162 4-methoxyphenyl tribromomethyl sulfonr: 134-137 benzyl iodomethyl sull'one 171-173 ethyl iotlomethyl sulfone 62-64 2-methyl-4-t-butylphenyl diiodomethyl sulfonc 127-128 2-nitro-4-methylphenyl clibromomethyl sulfonc 153-154 2-nitro-4-methylphenyl tribromomcthyl sulfonc 183-186 3-tolyl tribromomethyl sulfune 127-129 4-t-butylphenylbromomethyl sulfonc 138-139 2-nitro-4-methylphenyl iodomethyl sulfone 132-140 4-chlorobenzyl diiodomcthyl sulfone 138-141 2-nitro-4-chloropheny1iodomethyl sull'onc 183-184 Z-nitro-4-chlorophenyl tribromomethyl sulfone V I85 4-nitropheny1diiodomethylsultone 184-186 2-methyl-4 -t-butylphenyl tribromomethyl sulfone 137-138 2-nitro-4-chlorophenyl diiodomethyl sulfone 160-162 2-isopropylphenylbromomethyl sulfone 147-148 2-isopropylphenyldiiodomethyl sulfone 120-121 4-nilrophenyl tribromomethyl sullone 197-199 4-(2.2-dimethylpropyl)phcnyldiiodomethyl sulfone 107- 1 09 4-chlorobenzyl iodomethyl sulfone 219-220 cyclohexyl diiodomethyl sulfone 126-128 n-pentyl diiodomethyl sulfonc 51-53 n-hexyl diiodomethyl sulfone 46-48 n-propyl diiodomethyl sulfone 45-47 n-octyl diiodomethyl sulfonc 72-74 4-n1elhyl benzyl diiodomethyl sulfone 165-167 4-fluorobenzyl diiodomcthyl sulfone l 19- 121 -bromobenzyl dllodomethyl sulionl 149-15 1 4-methcxybcnzyl diiodomethyl sulfone 168-170 3-chlorobcnzyl diiodoniethyl sulfone 1132-184 3,5-dimelhyl diiodomethyl sulfone 188-190 1-pheny1-2-(diiodomethylsulfonyl)ethune 69-71 3-bromobenzyl diiodomcthyl sulfone 192-194 2-naphthylmethyl-diiodomethyl sulfone 1-phenyl-3-(diiodomethylsulfonyl)propane isobutyl diiodomethyl sulfonc 3.4-dimethylbenzyl diiodomethyl sulfone 3,3-dimcthylpropyl diiodomethyl sulfone 2,2.4,4-letramethylbutyl diiodomethyl sulfone 4-fluorobenzyl dibromomethyl sulfone 3-chlorobenzy1dibromomethylsulfone 4-bromobenzyl dibromomethyl sulfone 3.4-dichlorobenzyl dibromomethyl sullone 2.4-dich1orobenzyl dibromomethyl sulfonc 3-bromobenzy1dibromomethyl sulfone 2-bronmbenzy1dibromomethylsulfone 2-c1ilorobenzy1 dibromomethyl sulfone 4-mcthylbenzyl dibromomethyl sulfone Z-methylbenzyl dibromomethyl sulfone 3-methylbenzy1dibromomethylsulfone 4-nitrobenzy1dibromomethyl sulfone 4-methoxybcnzyl dibromomethyl sulfone 2,5-dimethy1bcnzyl dibromomethyl sull'one 3.4-dimethylbenzy1dibromomethylsulfone l-phenyl-Z-dibromomethylsulfonyl)ethane 1-pheny1-3-(dibromomethylsulfonyhpropane cyclohexyldibromomethyl sultonc n-heptyl dibromomethyl sulfone n-decyldibromomcthyl sulfonc n-hexadecyl dibromomethyl sulfone B-niethylpropyldiitidomethyl sulfonc n-decyldiiodomethyl sulfone oil The following example illustrates the application of the compounds of this invention as a coating composition to textiles which are expected to come in contact with the ground, such as those used for sand bags, tarpaulins and tents. The test was performed in accordance with the method described in Federal Specifications, Textiles Testing, CCC-T-l 91b. a method which is considered to be most severe.

EXAMPLEI Raveled strip samples were prepared from Pure-Finish" Indian Head cotton cloth, used as a standard test fabric. The test compound was applied to the fabric from acetone solution to provide 0.5 percent pickup by the fabric. Five test strips were treated with each compound and were buried in soil exposure beds along with five untreated test strips. The soil was rich with microbial life and was maintained at a temperature of 30+ or -2 C.

After 12 days tensile strength measurements were conducted on the treated and exposed strips. The average breaking strength of the untreated unexposed fabric was also measured. The results obtained are reported in table 1. The untreated exposed test strips had completely disintegrated.

TABLE 1 Cotton Fabric Resistance to Microbiological Degradation 2,4-dimethy1phenyl diiodomethyl sulfone 70.7 99.9 3,4-dichlorophenyl diiodomethyl sullone 68.0 96.0 benzyl diiodomethyl sulfone 82 l+ eyclohexyl diiodomethyl sulfone 74.5 100+ n-pcntyl diiodomethyl sulfone 52.0 73.5 n-hexyl diiodornethyl sulfone 63.0 89.0 n-octyl diiodomethyl sulfone 7l.0 100 4-bromobenzyl diiodomethyl sulfone 67.0 94.4 4-methoxybenzyl diiodorncthyl sulfone 67.0 94.4 l-phenyl-3-(diiodomethylsultonyl) propane 71.5 100+ 3.4-dimethylbenzyl diiodomethyl sulfone 58.0 8 I .7 Untreated Exposed 0 Untreated unexposed 7| It will be observed that all of the listed compounds enabled the fabric to retain about 75 percent of its breaking strength. For many of the compounds, the breaking strength of the treated fabric at the conclusion of the test was more than 90 percent of its initial value and for some of the compounds, the strips evidenced no measurable loss of strength.

The compounds named in table I, with the possible exception of 4-aminophenyldiiodomethyl sulfone, which is photosensitive, are particularly desirable for this application because the compounds are all colorless whereas other compounds often employed for this purpose, such as copper 8? hydroxyquinolinate which is green, impart a color to the fabric which is undesirable for many applications.

The preservation of exterior latex paint films against microbial attack is a matter of great importance and is a particularly several problem in the Southern latitudes. To be suitable for such an application, the protective compound, generally a fungicide must be nontoxic to humans and animals, is preferably colorless, and in any event must not change color with time, must resist leaching and photo decomposition. Desirably it possesses low volatility at a temperature on the order of l50-l60 F.

The following example illustrates the preparation of a latex paint containing a compound of this invention and its performance in affording protection to the coating film applied from such paint.

EXAMPLE ll-A Pigment39.7% Vehicle60.3%

Polyvinylacetate copolymer lid'k Water 84.6%

TiO, [0.9% CaCO 21.8% Silicates 67.3%

To 4% ml. of this paint is added 0.5 ml. of a dimethylformamide solution containing 5 percent by weight of the test compound. A 2.2 cm. filter paper disc is dipped into the paint and the excess paint is removed by blotting. The samples are conditioned by heating at C. for 8 hours and are then immersed in slowly running tap water for 48 hours at 25C.

The conditioned paint specimens are placed firmly on agar nutrient medium and 0.3 ml. of an inoculum of Aspergillus oryzae-ATCC 10196 is spread evenly over the surface of the specimen and nutrient medium. The inoculated specimens are incubated in a humidity box at 28 C. for 7 days. A control specimen is prepared using phenylmercuric acetate as the preservative compound. A the end of the incubation period, growth of the mold on the samples is compared with that on the control. The results are recorded and are as shown in table ll-A.

TABLE ll-A Compound Activity Equivalent to control Equivalent to control 4-chlorophenyl diiodomethyl sulfone 4-t-butyl-phenyl diiodmcthyl sulfone 2-methyl-4-chlorophenyl diiodmethyl sulfone alphanaphthyl diiodomethyl sulfone 3.4-dichlorophenyl diiodomethyl sult'one 2-methyl-4-t-butylphenyl diiodomethyl Equivalent to control Equivalent to control Equivalent to control sulfone Equivalent to control 442,2 -dimethylpropyl)phenyldiiodomethyl sulfone Equivalent to control Equivalent to control Equivalent to control Equivalent to control n-oetyl diiodomethyl sulfone 4-bromobenzyl diiodmethyl sull'one 4-n1ethoxyhenzyl diiodmethyl sulfone lphenyl-3-(diiodmethylsulfonyl) propane Equivalent to control 3.4-dimethylbenzyl diiodmethyl sulfone Equivalent to control A latex exterior paint was prepared according to the following recipe. Water pounds Potassium tri-polyphosphatel .0 pound (dispersant) Triton X-l004.0 pounds (wetting agent) TABLE IIB.PAINT WEATHERING TEST 3 months 6 months Color Dirt General Color Dirt General Compound change retention Mildew appearance change retention Mildew appearance 4-tolyl diiod omethylsulfoneun Bl. S1 S1 Good Bl Sl Mod. Fair.

-t-butyl- 4-b romophenyl diiodomethyl sultone. 4-methoxoyphenyl diiodomethyl sulfone. 2-methyl-4-chloropheny1 dliodornethyl sul nc Alphanaphthyl diiodomethyl sullone 3-methyl-4-bromophenyl diiodomethyl sulione 2,4-dimethy1phenyl diiodomethyl sulfone. Benzyl diiodomethyl sult'one 2-methyl-4-t-butylphenyl diiodomethyl sulfone. 4-chlorobenzyl dilodomethyl sulfone... 2-isopropylphen ldiiodomethyl sulfone 4-chlorophenyl iiodomethyl sullone Control:

None

Mercurial Pro. S1

CODE:

Color change=N 0 change, Bleached, Slight discoloration, Moderate discoloration, Pronounced discoloration.

General appearance=Exceilent, Very good, Good, Fair, Poor, Very poor.

rows of treated seeds were planted l inch apart, one-quarter inch deep, 20 seeds per row. Ten barley seeds infected with R. solani, a soil borne plant pathogen, were planted one-quarter inch deep between the two rows of treated seed. The flats were placed individually into plastic bags and sealed and cultured until the seedlings emergev After emergence, the flats are cultured at 68 F. until the test is completed 7 to l0 days later A sterile check and untreated check were also run.

The flats were then read for percent germination, and percent survival of those which germinated. The results are listed in Table lll.

UQBLE TIL-COATED SEEDS-GERMINATION AND SURVIVAL Untreated 10 p.p.m. ppm. 45 ppm. 90-125 p.p.m. Sterile check check Compound G S G S G S G S G S t; S

4to1yl diiodomethyl suhone 84 100 89 100 85 84 100 27 31 4-acetamido-pl1enyl diiodoniethyl sulloue- 86 100 89 100 73 84 100 27 31 4-ch1orophenyl diiodomethyl sull'one 81 100 81 100 83 77 100 67 35 4-t-butyl-phenyl diiodomethyl sulfone 78 100 86 100 8G 77 100 7 35 4-br0mophenyl diiodornethyl sultone 86 100 87 100 77 83 100 18 46 4methoxyphenyl dilodomethyl sulfon 83 100 86 100 83 83 100 18 46 2-methyl-4chlorophenyl diiodomethyl s 86 100 93 100 86 84 100 27 31 Alphanaphthyl diiodomethyl sulfone 80 100 76 96 81 76 100 46 16 2-methyl-4-bromophenyl diiodomethyl s t 76 80 41 67 3,4-dich1orophenyldiiodomethyl su|lonc 78 67 64 '22 6 4-methoxypheny1 tribromomethyl sulf0ne. 68 68 100 30 29 2-methyl-4t-butylpheuyl diiodomethyl sulf 48 68 100 30 2!) 2-nitro-4-methylphenyl ti'ibromomethyl sulfone. 90 66 60 100 36 27 2-nltro-4-chlorophenyl iodomethyl sulfone t 66 G7 64 22 5 4-nitropheny1 tnbromomethy] sulfoue 82 67 64 22 2 4 fluoro-benzyl dibromomethyl sulfone. 43 68 100 21 3-methylbenzyl dibromomethyl sulfone. 67 68 100 40 21 4-meth0xybenzyl dibromomethyl sulfone. 66 68 100 40 21 3,4-dimethylbenzyl dibromomethyl sull'one, 56 68 100 40 21 Pl1enyl-3-(dibromornethylsulfonyl) propane 68 68 100 40 21 Cylohexyldibromomethyl sulfone 50 68 100 40 21 n cptyl dibromomethyl sulfone 48 68 100 40 21 n-Hexadecyl dibromomethyl sullone 36 68 100 40 21 Code. G= Germlnatcd; S Survived.

Cellosize OP is hydroxyethylcellulose available from Union Carbide Company. Daxad dispersant comprises polymerized sodium and potassium salts of alkylnapthalene sulfonic acids manufactured by Dewey and Chemical Company. Texanol is an ester-alcohol trimethylpentadiolmonoiso butyrate available from Eastman Chemical Products inc. The copolymer vehicle is a polyvinyl acetate dibutyl fumarate copolymer emulsion.

To the foregoing paint formula was added one percent by weight of a test compound. Two coats were then applied to a Southern Yellow pine substrate and exposed to a direct weathering test in South Florida on test racks set at an angle of and facing South. For comparison, panels were coated with paint without preservative and with paint containing 1 percent phenylmercuric acetate. The panels were evaluated after 3 months and again after 6 months for color change, dirt retention, presence of mildew and general overall appearance. Results were as shown in Table Il-B U 7 7 From the foregoing, it is evident that a coating composition embodying a compound of this invention endures exposure well and protects the substrate; It is of interest to note that in two instances the general appearance of the panels improved between the 3 month and 6 month readings.

The following example illustrates protection afforded to seeds and seedlings by coating seeds with compounds of this invention.

EXAMPLE "I Seeds were coated by first distributing a predetermined amount of seed treating material as evenly as possible over the inner surface of a glass treatment jar. Flax seeds were then placed into the treatment jar and the seeds were tumbled by hand for 1 minute and mechanically for 5 additional minutes. The quantity of compound applied was from 10 parts per million to about 125 parts per million of seed.

A seed bed was prepared from 1800 grams of air dry sand mixed with 80 ml of tap water until the mixture appeared uniformly moist. The moist sand was placed into flats and two These results indicate that in most cases, the percent germination and percent survival approximate those obtained with the sterile check. It will be further noted that the treated seeds produced two to three times the number of surviving seedlings at the termination of the test as did the untreated check.

We claim:

1. A method of protecting potential agricultural and industrial hosts against fungi and bacterial attack comprising coating said host with a compound of the formula wherein n is an integer from zero to four and R' is selected from the group consisting of alkyl, phenyl, loweralkylphenyl, monohalophenyl, polyhalophenyl, nitrophenyl, 'halonitrophenyl, nitroloweralkylphenyl, haloloweralkylphenyl, or polylowerallcylphenyl.

2. A coating composition adapted to protect potential agricultural and industrial hosts against fungi and bacterial attack, said composition comprising from about 0.1 to about 2.0 percent by weight ofa compound of the formula 7. The method of claim 1 wherein the R substituent is alkylphenyl.

8. The method of claim 1 wherein R is paratolyl.

9. The method of claim 1 wherein R is paratertiarybu- 0. e method of claim 1 wherein R is 2-methyl-4-tertlarybutylphenyl.

11. The method of claim 1 wherein the R substituent is noctyl.

12. The method of claim 1 wherein the R substituent is paraanisy].

13. The method of claim 1 wherein the R substituent is cyclohexyl.

14. The method of claim 1 wherein the R substituent is 2- naphyl.

15. The method of claim 1 wherein the R substituent is 2- methyl-4-chlorophenyl.

16. A coating composition according to claim 2 wherein the carrier is a latex paint and the compound is present in an amount from about 0.1 percent to about 2 percent.

17. A coating composition according to claim 2 adapted to protect a textile potential host wherein the carrier is a volatile solvent.

18. A coating composition according to claim 2 adapted to protect viable seed potential host wherein the carrier is selected from the group consisting of a volatile solvent and an inert powder.

19. A coating composition according to claim 2, wherein the compound is present in an amount sufficient to produce a biocidal effect.

20. A composition according to claim 2 wherein R is phenyl.

21. An industrial material comprising a potential host for bacterial and fungal attack having at least a portion of its surface protected by a coating composition according to claim 2 whereby said host is rendered resistant to attack by a member of the class consisting offungi and bacteria.

22. An industrial material according to claim 21 wherein the potential host is cotton fabric.

23. An industrial material according to claim 21 wherein the potential host is a latex paint film and its supporting substrate.

24. The method of claim 1 wherein said composition is a liquid and including the sktlep o f drsyin-gmthfixwmpgiggn whereby the compound is ad ered to the host.

UNITED STATES PATENT OFFiCE CERTHHCATE 0F CORRECTION Patent No. ,745 Dated October 26, 1971 lnvenun(s) Aldo J. Grovetti and Donald S. Kennev It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In Claims 1 and 2, please delete the formula R-(CH and substitute therefor Signed and sealed this 25th day of April 1972.

(SEAL) ACESSLI EDWARD M.FLETGHER,JR. -ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents 'ORM 1 0-1050 (10-69% USCOMM-DC seam-Poe IJ.S GOVERNMENT PRINTING OFFICE l9DO-356-33l 

2. A coating composition adapted to protect potential agricultural and industrial hosts against fungi and bacterial attack, said composition comprising from about 0.1 to about 2.0 percent by weight of a compound of the formula wherein n is an integer from zero to four and R is selected from the group consisting of alkyl, phenyl, loweralkylphenyl, monohalophenyl, polyhalophenyl, nitrophenyl, halonitrophenyl, nitroloweralkylphenyl, haloloweralkylphenyl, or polyloweralkylphenyl.
 3. The method of claim 1 wherein the R substituent is halophenyl.
 4. The method of claim 1 wherein R is parachlorophenyl.
 5. The method of claim 1 wherein R is parabromophenyl.
 6. The method of claim 1 wherein R is 3 . 4-dichlorophenyl.
 7. The method of claim 1 wherein the R substituent is alkylphenyl.
 8. The method of claim 1 wherein R is paratolyl.
 9. The method of claim 1 wherein R is paratertiarybutylphenyl.
 10. The method of claim 1 wherein R is 2-methyl-4-tertiarybutylphenyl.
 11. The method of claim 1 wherein the R substituent is n-octyl.
 12. The method of claim 1 wherein the R substituent is paraanisyl.
 13. The method of claim 1 wherein the R substituent is cyclohexyl.
 14. The method of claim 1 wherein the R substituent is 2-naphyl.
 15. The method of claim 1 wherein the R substituent is 2-methyl-4-chlorophenyl.
 16. A coating composition according to claim 2 wherein the carrier is a latex paint and the compound is present in an amount from about 0.1 percent to about 2 percent.
 17. A coating composition according to claim 2 adapted to protect a textile potential host wherein the carrier is a volatile solvent.
 18. A coating composition according to claim 2 adapted to protect viable seed potential host wherein the carrier is selected from the group consisting of a volatile solvent and an inert powder.
 19. A coating composition according to claim 2, wherein the compound is present in an amount sufficient to produce a biocidal effect.
 20. A composition according to claim 2 wherein R is phenyl.
 21. An industrial material comprising a potential host for bacterial and fungal attack having at least a portion of its surface protected by a coating composition according to claim 2 whereby said host is rendered resistant to attack by a member of the class consisting of fungi and bacteria.
 22. An industrial material according to claim 21 wherein the potential host is cotton fabric.
 23. An industrial material according to claim 21 wherein the potential host is a latex paint film and its supporting substrate.
 24. The method of claim 1 wherein said composition is a liquid and including the step of drying the composition whereby the compound is adhered to the host. 